Components/DictionaryAdapter/Castle.Components.DictionaryAdapter/Attributes/DictionaryStringValuesAttribute.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.Components.DictionaryAdapter
  16 {
  17         using System;
  18         using System.Collections;
  19         using System.ComponentModel;
  20         using System.Reflection;
  21
  22         /// <summary>
  23         /// Converts all properties to strings.
  24         /// </summary>
  25         [AttributeUsage(AttributeTargets.Interface | AttributeTargets.Property,
  26                 AllowMultiple = false, Inherited = true)]
  27         public class DictionaryStringValuesAttribute : Attribute, IDictionaryPropertySetter
  28         {
  29                 private string format;
  30
  31                 /// <summary>
  32                 /// Gets or sets the format.
  33                 /// </summary>
  34                 /// <value>The format.</value>
  35                 public string Format
  36                 {
  37                         get { return format; }
  38                         set { format = value; }
  39                 }
  40
  41                 #region IDictionaryPropertySetter Members
  42
  43                 object IDictionaryPropertySetter.SetPropertyValue(
  44                         IDictionaryAdapterFactory factory, IDictionary dictionary,
  45                         string key, object value, PropertyDescriptor property)
  46                 {
  47                         if (value != null)
  48                         {
  49                                 return GetPropertyAsString(property.Property, value);
  50                         }
  51                         return value;
  52                 }
  53
  54                 #endregion
  55
  56                 private string GetPropertyAsString(PropertyInfo property, object value)
  57                 {
  58                         TypeConverter converter = GetTypeConverter(property);
  59                         if (converter != null)
  60                         {
  61                                 if (converter.CanConvertTo(typeof(string)))
  62                                 {
  63                                         return (string) converter.ConvertTo(value, typeof(string));
  64                                 }
  65                         }
  66
  67                         if (!string.IsNullOrEmpty(format))
  68                         {
  69                                 return String.Format(format, value);
  70                         }
  71                         return value.ToString();
  72                 }
  73
  74                 private TypeConverter GetTypeConverter(PropertyInfo property)
  75                 {
  76                         Type converterType = AttributesUtil.GetTypeConverter(property);
  77                         if (converterType != null)
  78                         {
  79                                 return (TypeConverter) Activator.CreateInstance(converterType);
  80                         }
  81                         return null;
  82                 }
  83         }
  84 }